CN216134569U - Wireless microphone system - Google Patents
Wireless microphone system Download PDFInfo
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- CN216134569U CN216134569U CN202121461897.XU CN202121461897U CN216134569U CN 216134569 U CN216134569 U CN 216134569U CN 202121461897 U CN202121461897 U CN 202121461897U CN 216134569 U CN216134569 U CN 216134569U
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Abstract
The utility model discloses a wireless microphone system, which comprises a collar clip type transmitter (1) and a receiver (8), wherein the collar clip type transmitter comprises a shell and an audio circuit component arranged in the shell, and the audio circuit component comprises: the signal input and output unit (2) comprises a first audio signal input interface (21), a second audio signal input interface (22) and an audio signal output interface (23), and the first audio signal input interface and the second audio signal input interface are in alternative switching setting; a wireless communication unit (4) for transmitting and receiving an audio signal with a receiver (8); a signal processing unit (3) connected between the signal input/output unit and the wireless communication unit; the built-in microphone (5), the built-in microphone output end connects the first audio signal input interface. The utility model realizes bidirectional audio signal transmission, so that the anchor can realize live broadcast monitoring by connecting the headset with the transmitter.
Description
Technical Field
The utility model relates to the technology of audio signal transmission and processing of a live broadcast system, in particular to a wireless microphone system capable of realizing bidirectional audio signal transmission.
Background
With the progress of network communication technology and the speed increase of broadband networks, live broadcast systems using mobile terminals such as mobile phones and tablet computers are increasingly developed and applied. In the live broadcast system, when the main broadcast carries out live broadcast, if a wireless microphone (or called wireless microphone) system is adopted, the main broadcast can be free from the limitation of cables, the operation is more convenient, and the live broadcast effect is more ideal. The wireless microphone system generally comprises a split transmitter and receiver, which transmit audio signals in a wireless communication manner, the transmitter being carried by the anchor, wherein the more popular mini-transmitter can be clipped onto a collar by a user, commonly known as a collar-clip microphone, and the receiver is connected to a live device (e.g. a mobile phone or a tablet computer), whereby the anchor can move freely within a certain distance from the live device. The transmitter is provided with a microphone for receiving an audio signal of a main broadcast, the transmitter transmits the audio signal to the receiver, and the receiver correspondingly processes the audio signal and then sends the audio signal to the live broadcast equipment.
Although the anchor can carry out live broadcast only by carrying a transmitter, the distance limitation between the anchor and a receiver and between the anchor and the live broadcast equipment is eliminated, because the transmitter adopts one-way signal transmission, the anchor cannot monitor own voice and receive the voice transmitted by the live broadcast equipment by connecting the transmitter through an earphone system under the condition of not using other equipment such as a sound card and the like, and therefore, assistant personnel are often needed to complete corresponding tasks such as monitoring.
SUMMERY OF THE UTILITY MODEL
Based on the above situation, a primary object of the present invention is to provide a wireless microphone system, in which the apparatus implements bidirectional audio signal transmission between a collar-clip transmitter and a receiver, so that a main broadcast can connect the collar-clip transmitter via an earphone to receive a sound signal from a live broadcast device during a live broadcast process, and monitor its own sound signal.
In order to achieve the purpose, the technical scheme adopted by the utility model is as follows:
a wireless microphone system comprising a collar-clip transmitter and a receiver, the collar-clip transmitter and the receiver transmitting audio signals therebetween in a wireless communication manner, the receiver having a live audio interface for connection to a live device, the collar-clip transmitter comprising a housing and an audio circuit assembly disposed within the housing, the audio circuit assembly comprising:
the signal input and output unit comprises a first audio signal input interface, a second audio signal input interface and an audio signal output interface, and the first audio signal input interface and the second audio signal input interface are in alternative switching setting;
a wireless communication unit for transmitting and receiving an audio signal with a receiver;
a signal processing unit connected between the signal input/output unit and the wireless communication unit; the signal processing unit is used for sending the audio signal received by the signal input and output unit to the wireless communication unit and sending the audio signal received by the wireless communication unit to the signal input and output unit;
and the output end of the built-in microphone is connected with the first audio signal input interface.
The earphone interface comprises a microphone interface end and an earphone interface end, the microphone interface end is connected with the second audio signal input interface, and the earphone interface end is connected with the audio signal output interface.
Preferably, the signal processing unit comprises a microcontroller, a first signal channel and a second signal channel are arranged between the microcontroller and the signal input and output unit, a third signal channel and a fourth signal channel are arranged between the microcontroller and the wireless communication unit,
the first signal channel is used for sending the audio signal received by the first audio signal input interface or the second audio signal input interface from the signal input and output unit to the microcontroller for processing to obtain a processed first audio signal, and the third signal channel is used for sending the first audio signal from the microcontroller to the wireless communication unit and sending the first audio signal to the receiver through the wireless communication unit;
the fourth signal channel is used for sending the audio signal received by the wireless communication unit from the wireless communication unit to the microcontroller, the microcontroller is used for processing the first audio signal and the audio signal received by the fourth signal channel to obtain a processed second audio signal, and the second signal channel is used for sending the second audio signal from the microcontroller to the signal input and output unit and outputting the second audio signal through the audio signal output interface.
Preferably, the first signal channel and the second signal channel both use the I2S bus standard for audio signal transmission.
Preferably, the first audio signal input interface is an analog interface, and the first audio signal input interface is connected to the input end of the first signal channel through an analog-to-digital converter.
Preferably, the second audio signal input interface is an analog interface, and the second audio signal input interface is connected to the input end of the first signal channel through an analog-to-digital converter.
Preferably, the audio signal output interface is an analog interface, and an output end of the second signal channel is connected to the audio signal output interface through a digital-to-analog converter.
Preferably, the third signal channel and the fourth signal channel both adopt SPI protocol standard for audio signal transmission.
Preferably, the microcontroller comprises a mixing module, configured to mix the first audio signal and the audio signal received through the fourth signal channel to obtain the second audio signal, and send the second audio signal to the second signal channel.
Preferably, the wireless communication unit comprises a 2.4GHz radio frequency chip.
Preferably, the headset interface is a 3.5mm headset interface.
The wireless microphone system is applied to a direct broadcast system and can realize bidirectional audio signal transmission between the collar clamp transmitter and a receiver by arranging the signal processing unit, the signal input/output unit and the wireless communication unit on the collar clamp transmitter. Secondly, the signal input/output unit on the collar clip type transmitter can provide two audio signal input modes, can meet the requirements of different audio signal input assemblies, the anchor can send sound signals through a built-in microphone and can send sound signals through an external headset system, and meanwhile, the signal input/output unit also provides an audio signal output interface, so that the anchor can hear sounds sent by live broadcast equipment, such as accompanying music. The utility model can realize the wireless microphone and wireless monitoring function of the anchor broadcast in the direct broadcast by the two-way audio signal transmission mode, and the collar clip type transmitter is also beneficial to improving the user experience and improving the direct broadcast effect.
Other advantages of the present invention will be described in the detailed description, and those skilled in the art will understand the technical features and technical solutions presented in the description.
Drawings
Preferred embodiments of a wireless microphone system according to the present invention will be described below with reference to the accompanying drawings. In the figure:
FIG. 1 is a schematic block diagram of the circuitry of the wireless microphone system of the present invention;
FIG. 2 is a schematic circuit diagram of a signal input/output unit according to a preferred embodiment of the present invention;
fig. 3 is a schematic circuit diagram of a built-in microphone according to a preferred embodiment of the present invention;
fig. 4 is a schematic circuit diagram of a microphone interface according to a preferred embodiment of the present invention;
fig. 5 is a schematic circuit diagram of an earphone interface according to a preferred embodiment of the present invention;
FIG. 6 is a schematic diagram of the circuit configuration of the microcontroller according to the preferred embodiment of the present invention;
fig. 7 is a schematic circuit diagram of a wireless communication unit according to a preferred embodiment of the present invention.
Description of reference numerals: the system comprises a 1-neck type transmitter, a 2-signal input and output unit, a 21-first audio signal input interface, a 21-second audio signal input interface, a 23-audio signal output interface, a 3-signal processing unit, a 31-first signal channel, a 32-second signal channel, a 33-third signal channel, a 34-fourth signal channel, a 4-wireless communication unit, a 5-built-in microphone, a 6-microphone interface, a 7-earphone interface, an 8-receiver and 9-live broadcast equipment.
Detailed Description
Referring to fig. 1, a wireless microphone system 1 includes a collar-clip transmitter 1 and a receiver 8, wherein the collar-clip transmitter 1 and the receiver 8 transmit audio signals therebetween in a wireless communication manner, and the receiver 8 has a live audio interface for connecting a live device 9.
The collar clip transmitter 1 includes a housing and an audio circuit assembly disposed within the housing.
The collar clamp is arranged on the shell and used for clamping the whole collar clamp type transmitter shell on the collar.
The audio circuit assembly includes a signal input-output unit 2, a wireless communication unit 4, a signal processing unit 3, a built-in microphone 5, a microphone interface 6, and an earphone interface 7. And the wireless communication unit 4 is used for transmitting and receiving the audio signal with the wireless communication unit of the receiver 8, and the wireless communication unit 4 comprises a 2.4GHz radio frequency chip.
The signal input output unit 2 includes a first audio signal input interface 21, a second audio signal input interface 22, and an audio signal output interface 23, wherein the first audio signal input interface 21 and the second audio signal input interface 22 are either an alternative interface. The output end of the built-in microphone 5 is connected with the first audio signal input interface 21. The microphone interface 6 is connected with the second audio signal input interface 22, the earphone interface 7 is connected with the audio signal output interface 23, and the audio signal output interface 23 supports stereo audio signals.
Specifically, the alternative is configured to control the built-in microphone 5 to be not operated when it is detected that the earphone interface is inserted into the earphone, and to be operated when it is detected that the earphone interface is not inserted into the earphone.
The signal processing unit 3 is connected between the signal input/output unit 2 and the wireless communication unit 4. The signal processing unit 3 is configured to process the audio signal received by the signal input/output unit 2 and send the processed audio signal to the wireless communication unit 4, and process the audio signal received by the wireless communication unit 4 and send the processed audio signal to the signal input/output unit 2.
In this embodiment, a 3.5mm headset interface is used to connect to the headset system of the main broadcast, the headset interface includes a microphone interface end and an earphone interface end, the microphone interface end is used as the microphone interface 7 to connect to the second audio signal input interface 22, and the earphone interface end is used as the earphone interface 7 to connect to the audio signal output interface 23.
Specifically, the signal processing unit 3 comprises a Microcontroller (MCU), a first signal channel 31 and a second signal channel 32 are arranged between the microcontroller and the signal input and output unit, a third signal channel 33 and a fourth signal channel 34 are arranged between the microcontroller and the wireless communication unit 4, the first signal channel 31 is used for transmitting the audio signal received by the first audio signal input interface or the second audio signal input interface from the signal input and output unit to the microcontroller for processing to obtain a processed first audio signal, the third signal channel 33 is used for transmitting the first audio signal from the microcontroller to the wireless communication unit 4 and transmitting the first audio signal to the receiver through the wireless communication unit, and the fourth signal channel is used for transmitting the audio signal received by the wireless communication unit from the receiver 8 from the wireless communication unit to the microcontroller, the microcontroller is used for processing the first audio signal and the audio signal received through the fourth signal channel to obtain a processed second audio signal, and the second signal channel is used for sending the second audio signal from the microcontroller to the signal input and output unit and outputting the second audio signal through the audio signal output interface.
Specifically, the audio signal received through the first audio signal input interface or the second audio signal input interface is a binaural signal, and after the microcontroller receives the binaural signal, one of the two signals is selected to obtain the first audio signal.
The first signal path 31 and the second signal path 32 may each employ the I2S bus standard for audio signaling. The I2S (Inter-IC Sound) bus, also called the integrated circuit built-in audio bus, avoids distortion induced by time difference by separating the data signal and the clock signal, and does not need a special device for resisting audio jitter. The third signal channel 33 and the fourth signal channel 34 both use SPI protocol standard for audio signal transmission. The SPI (serial Peripheral interface) protocol, namely a serial Peripheral interface protocol, is a high-speed, full-duplex and synchronous communication bus, only four pins are occupied in a chip for data transmission and control, the number of chip pins can be greatly saved, and meanwhile, the space is saved for the layout of a PCB.
The first signal path 31 is used to transmit audio signals from the signal input output unit 2 to the microcontroller, and the second signal path 32 is used to transmit audio signals from the microcontroller to the signal input output unit 2.
The first audio signal input interface 21 may be a digital interface or an analog interface. When the output signal of the built-in microphone 5 connected to the first audio signal input interface 21 is an analog signal, the first audio signal input interface 21 is an analog interface, and the first audio signal input interface 21 is connected to the input end of the first signal path 31 through an analog-to-digital converter. When the output signal of the built-in microphone connected to the first audio signal input interface 21 is a digital signal, the first audio signal input interface 21 is a digital interface, and the first audio signal input interface 21 is connected to the input end of the first signal path 31.
The second audio signal input interface 22 may be a digital interface or an analog interface. When the output signal of the microphone interface 6 connected to the second audio signal input interface 22 is an analog signal, the second audio signal input interface 22 is an analog interface, and the second audio signal input interface 22 is connected to the input end of the first signal channel 31 through an analog-to-digital converter. When the output signal of the microphone interface 6 connected to the second audio signal input interface 22 is a digital signal, the second audio signal input interface 22 is a digital interface, and the second audio signal input interface 22 is connected to the input end of the first signal channel 31.
The audio signal output interface 23 may be a digital interface or an analog interface. When the input signal of the earphone interface 7 connected to the audio signal output interface 23 is an analog signal, the audio signal output interface 23 is an analog interface, and the output end of the second signal channel 32 is connected to the audio signal output interface 23 through a digital-to-analog converter. When the input signal of the earphone interface 7 connected to the audio signal output interface 23 is a digital signal, the audio signal output interface 23 is a digital interface, and the output end of the second signal channel 32 is connected to the audio signal output interface 23.
The microcontroller comprises a mixing module, and the mixing module is used for mixing the first audio signal and the audio signal received through the fourth signal channel to obtain the second audio signal, and sending the second audio signal to the second signal channel (32).
In the above embodiments, the processing of the audio signal is performed in the microcontroller. The audio signal may be processed in the signal input/output unit (2) or the wireless communication unit (4).
Therefore, when the main broadcast carries out live broadcast and needs to send audio signals, the built-in microphone can be selected to be used and the sound can be transmitted to the live broadcast equipment through the first audio signal input interface, and the microphone assembly of the headset system can be selected to be used and the sound can be transmitted to the live broadcast equipment through the second audio signal input interface. Meanwhile, the main broadcast can also receive audio signals (such as accompaniment music) transmitted by the live broadcast equipment and audio signals input by a microphone or a microphone assembly of the headset system through an earphone assembly of the headset system, so that the functions of live broadcast monitoring and return to the ears are realized.
IN the present embodiment, the signal input/output unit has a chip model of NAU88L21, and referring to fig. 2 to 5, output terminals MIC-1 and MIC + of the built-IN microphone 5 are connected to pins MIC-IN _ P and MIC-IN _ N of the signal input/output unit 2 via a peripheral circuit, and are configured to input a received audio signal to the signal input/output unit 2; the microphone interface end HP-MIC is connected with a pin MIC _ OUT of the signal input and output unit 2 through a peripheral circuit and is used for inputting an audio signal received by the headset interface to the signal input and output unit 2; the headphone interface terminals LHP and RHP are connected to pins HPOUTL and HPOUTR of the signal input output unit 2, respectively, via peripheral circuits, for receiving audio signals. Pins I2S _ DO and I2S _ DI of the signal input output unit 2 perform audio signal transmission with the signal processing unit 3 through the first signal path 31 and the second signal path 32, respectively. Referring to fig. 6, in the signal processing unit 3, pins I2S _ DI and I2S _ DO of the microcontroller perform audio signal transmission with the signal input output unit 2 through the first signal channel 31 and the second signal channel 32, respectively, and pins SPI _ DO and SPI _ DI of the microcontroller perform audio signal transmission with the wireless communication unit 4 through the third signal channel 33 and the fourth signal channel 34, respectively. Referring to fig. 7, pins SPI _ DI and SPI _ DO of the wireless communication unit 4 perform audio signal transmission with the signal processing unit 3 through the third signal channel 33 and the fourth signal channel 34, respectively.
In addition, the wireless microphone system also comprises a power supply unit which is used for supplying power to each unit in the device. The power supply unit comprises a Type-C interface and is used for providing a charging function for the wireless microphone system. The power supply unit may also be a detachable battery structure.
The wireless microphone system is applied to a live broadcast system, and a main broadcast can receive sound signals from live broadcast equipment by wearing the collar clip type transmitter and the headset system in the live broadcast process and can hear the sound signals sent by the main broadcast equipment, so that the ear return monitoring function is realized, the user experience is improved, and the live broadcast effect is improved.
It will be appreciated by those skilled in the art that the above-described preferred embodiments may be freely combined, superimposed, without conflict.
It will be understood that the embodiments described above are illustrative only and not restrictive, and that various obvious and equivalent modifications and substitutions for details described herein may be made by those skilled in the art without departing from the basic principles of the utility model.
Claims (10)
1. A wireless microphone system comprising a collar-clip transmitter (1) and a receiver (8), said collar-clip transmitter (1) and said receiver (8) transmitting audio signals therebetween by wireless communication, said receiver (8) having a live audio interface for connection to a live device (9), characterized in that said collar-clip transmitter (1) comprises a housing and an audio circuit assembly disposed within said housing, said audio circuit assembly comprising:
the signal input and output unit (2), the signal input and output unit (2) comprises a first audio signal input interface (21), a second audio signal input interface (22) and an audio signal output interface (23), and the first audio signal input interface (21) and the second audio signal input interface (22) are in alternative switching setting;
a wireless communication unit (4) for transmitting and receiving an audio signal with a receiver (8);
a signal processing unit (3) connected between the signal input/output unit (2) and the wireless communication unit (4); the signal processing unit (3) is used for sending the audio signal received by the signal input and output unit (2) to the wireless communication unit (4) and sending the audio signal received by the wireless communication unit (4) to the signal input and output unit (2);
the output end of the built-in microphone (5) is connected with the first audio signal input interface (21);
the headset interface comprises a microphone interface end and an earphone interface end, the microphone interface end is connected with the second audio signal input interface (22), and the earphone interface end is connected with the audio signal output interface (23).
2. Wireless microphone system according to claim 1, characterized in that the signal processing unit (3) comprises a microcontroller, between which a first signal channel (31) and a second signal channel (32) are arranged, and between which a third signal channel (33) and a fourth signal channel (34) are arranged,
the first signal channel (31) is used for sending an audio signal received by the first audio signal input interface or the second audio signal input interface from the signal input/output unit to the microcontroller for processing to obtain a processed first audio signal, and the third signal channel (33) is used for sending the first audio signal from the microcontroller to the wireless communication unit (4) and sending the first audio signal to the receiver through the wireless communication unit;
the fourth signal channel is used for sending the audio signal received by the wireless communication unit from the wireless communication unit to the microcontroller, the microcontroller is used for processing the first audio signal and the audio signal received by the fourth signal channel to obtain a processed second audio signal, and the second signal channel is used for sending the second audio signal from the microcontroller to the signal input and output unit and outputting the second audio signal through the audio signal output interface.
3. The wireless microphone system of claim 2, wherein the first signal path (31) and the second signal path (32) each employ the I2S bus standard for audio signal transmission.
4. A wireless microphone system according to claim 2, characterized in that the first audio signal input interface (21) is an analog interface, the first audio signal input interface (21) being connected to an input of the first signal path (31) via an analog-to-digital converter.
5. A wireless microphone system according to claim 2, characterized in that the second audio signal input interface (22) is an analog interface, the second audio signal input interface (22) being connected to the input of the first signal path (31) via an analog-to-digital converter.
6. A wireless microphone system according to claim 2, characterized in that the audio signal output interface (23) is an analog interface, and the output of the second signal path (32) is connected to the audio signal output interface (23) via a digital-to-analog converter.
7. A wireless microphone system according to claim 3, characterized in that the third signal path (33) and the fourth signal path (34) both employ the SPI protocol standard for audio signal transmission.
8. The wireless microphone system according to claim 2, wherein the microcontroller comprises a mixing module for mixing the first audio signal and the audio signal received via the fourth signal channel to obtain the second audio signal, and sending the second audio signal to the second signal channel (32).
9. Wireless microphone system according to any of claims 1 to 8, characterized in that the wireless communication unit (4) comprises a 2.4GHz radio frequency chip.
10. The wireless microphone system according to any of claims 1 to 8, wherein the headset interface is a 3.5mm headset interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121461897.XU CN216134569U (en) | 2021-06-29 | 2021-06-29 | Wireless microphone system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121461897.XU CN216134569U (en) | 2021-06-29 | 2021-06-29 | Wireless microphone system |
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| CN216134569U true CN216134569U (en) | 2022-03-25 |
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| CN202121461897.XU Active CN216134569U (en) | 2021-06-29 | 2021-06-29 | Wireless microphone system |
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- 2021-06-29 CN CN202121461897.XU patent/CN216134569U/en active Active
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